Improvement in sewing-machines



T, WEBER 2Sheets--,S'heet1.

Sewing-Machine.

Patented Aug. 3,1875.

Wi/ZIULSS es NY PETERS. PHOTO 2 Sl wets sh eet 2.

T. A. WEBER.

Sewing-Machine.

Patented Aug. 3,1875.

W J R 2% Wmi U ITED STATES PATENT QFFIoE.

THEODORE A. WEBER, onnnw. YORK, N. .Y., ASSIGNOR or THREE-FOUBTHS HISRIGHT To RESOLVID GARDNER AND LEBBEUS w. LATHnoP, OF

SAME PLACE.

, IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 166,236, dated August3, 1875; application filed January 12, 1875.

which consists,first,in a crank-pin at the front end of a driving-shaft,which, in connection with a link and carrier, conveys a commercial spoolof thread by an elliptic revolving move? ment through a loop ofneedle-thread, which is formed by an oscillating looper, driven by acam, and increased by the beveled edge of a shuttle containing thecommercial spool of thread. The second part of my invention consists inthe manner of holding and fastening a shuttle to the upper swinging endof a carrier secured from displacement as the needle-loop passes freelyover said shuttle and between it and its resting-places.

Figure 1 is a side elevation, and partly a longitudinal section, of amachine embodying my invention. Fig. 3 is a detail view of thespool-carrier, showing the manner of fastening the shuttle to it. Fig. 4is a detail view of the parts engaged to form the chain-stitch.

A is the driving-shaft, at the front end of which is crank-pin B. Fisthe shuttle-carrier with its resting-places for the shuttle at F and Fon its upper end. K is the shuttle in position. The lower end of carrierF is joined at E to link G, which at its opposite end is joined to thestationary post H.

By revolving the driving-shaft A, crank-pin B turns in carrier F, whichjoint action with link G causes shuttle K with its spoolL to revolve inan elliptic line, thereby passing the shuttle with its spool through andbeyond the needle-loop of thread, which has been formed partly by theaction. of looper D, and

Fig. 2 is a plan of the same.

increased by the beveled edge K of shuttle K, said shuttle beingrelieved from its restingplace F (sufficient for the free passage ofupper thread) by the shuttle coming in contact and passing over hookedend of post .Y, which is fastenedto the front end of needle-plate W.

The looper D is joined to post I and is held (by means of a spring) withits lower end against cam O, which, by its revolution, causes the upperend of said looper to oscillate sufficiently to engage and extend theneedleloop against the beveled edge K of shuttle K, thereby forming afree passage for a commercial spool of thread. The under spool havingthus passed through the needleloop it leaves a bite of its thread lockedin said loop, so that it shall be drawn into the fabric by the action oftake'up J on the upper thread, which thereby completes the lockstitchbefore the needle-eye haspassed above the fabric in its upward motion,thus causing the upper thread to have free passage in the groove of theneedle.

The shuttle K is held in position on its resting -places F and F oncarrier F by finger M, that is hinged to said carrier at N, and presseddown over a notched projection at O, which notch receives the movablecatch 0 that holds finger M over shuttle K to keep it in position on thecarrier F.

On the underneath side of the needle-plate W swings, at V, Fig. 4, ahooked piece, V, which is intended to place the loop of upper thread insuch position that the needle Q in its downward passage shall enter saidloop, so as to form the double lock-chain stitch, or

if theunder thread is dispensed with, the sin gle chain-stitch.

The hook V is held out of the upper thread by means of spring U, anddriven forward by a small lever, T, which swings on post S, and

is operated by crank-pin 1, said pin being moved with looper D. StoppinB, which passes through post S, will hold lever T from contact with pinP, preventing the from coming into action.

Having-thus described myinvention, I claim hook V as new and desire tosecure by Letters Patent l. The combination of looper D and cam C, withshuttle K, its holder F, crank-pin B, link G, and stationary post H, asand for the purpose set forth.

2. The combination, with shuttle K, of oa-rrier F, provided withresting-places F and F, finger M notched projection 0, and catch 0, asand for the purpose specified.

THEODORE A. WEBER. Witnesses:

J. H. FEUERBACH, HERMAN FIEDLER.

